Revert of [sensors] Ambient light sensor implementation for ChromeOS and Linux.

device/generic_sensor/sensor_provider_impl.cc

Index: device/generic_sensor/sensor_provider_impl.cc
diff --git a/device/generic_sensor/sensor_provider_impl.cc b/device/generic_sensor/sensor_provider_impl.cc
index 63b2744f92f2795f8bcc6b939616adf5a94ada54..8a7860cb1c971d16493ace11b16fe353f1da3dda 100644
--- a/device/generic_sensor/sensor_provider_impl.cc
+++ b/device/generic_sensor/sensor_provider_impl.cc
@@ -32,12 +32,9 @@
 }  // namespace
 
 // static
-void SensorProviderImpl::Create(
-    scoped_refptr<base::SingleThreadTaskRunner> file_task_runner,
-    mojom::SensorProviderRequest request) {
+void SensorProviderImpl::Create(mojom::SensorProviderRequest request) {
   PlatformSensorProvider* provider = PlatformSensorProvider::GetInstance();
   if (provider) {
-    provider->SetFileTaskRunner(file_task_runner);
     mojo::MakeStrongBinding(base::WrapUnique(new SensorProviderImpl(provider)),
                             std::move(request));
   }